Lpc2000

With CrossStudio and J-Link it seems to be not possible to change the 
speed of JTAG. I have tried it with Wiggler and have no luck at all.

Jan.

--- In lpc2000@yahoogroups.com, "Leon Heller" <leon.heller@d...> 
wrote:
> ----- Original Message ----- 
> From: "Jan Szymanski" <janek@b...>
> To: <lpc2000@yahoogroups.com>
> Sent: Saturday, February 05, 2005 9:45 AM
> Subject: [lpc2000] How to debug the debuging interface ?
> 
> 
> > 
> > 
> > I have samples of LPC2138 and I built a prototype board.
> > With an evaluation version of CrossStudio I created a simple 
blinking 
> > LEDs application.
> > Using Philips flash utility I am able to program the micro and it 
> > works. Have problems however with debugging and programming 
through 
> > JTAG. I tried both JLink and Olimex wiggler compatible jtags, 
which 
> > are working fine with another board (IAR Kicstart Kit for LPC2106)
> > using either IAR or RA software.
> > With 2138 board I am able to connect to JTAG (from CrossStudio 
menu),
> > but when trying to do anything else, JTAG is loosing 
communication 
> > with the target.
> > My JTAG interface hardware is a copy of the one used on the Keil 
> > MCB2130 evaluation board (see schematic here
> > http://www.keil.com/mcb2130/mcb2130-schematics.pdf )
> > I checked the connections and all looks OK. 
> > The supply voltage (+3.3V) is very clean and connections between 
> > microcontroller and JTAG socket are rather short.
> > Any hints or suggestions will be appreciated.
> 
> Have you tried using a slower interface setting for the JTAG?
> 
> Leon
> 
> 
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